PLC Interview Question: Why 4 mA? Why NOT 0 mA? | 4-20 mA Current

This is a PLC interview question and it is Why we have selected 4 mA? and Why NOT some other value like 0 mA? Register 4-20 mA Course: https://www.udemy.com/course/why-4-20-ma-plc-electrical-instrumentation-training/?referralCode=4B3862D4DA7F2B787FE8 #plc #question #engineering Tags: PLC interview questions, 4-20 mA interview question, why 4 mA is used, why not 0 mA in current loop, 4-20 mA explained, live zero concept, PLC analog signals, instrumentation interview, current loop basics, smart transmitter 4-20 mA, loop powered transmitter, PLC analog input, fault detection in 4-20 mA, industrial automation interview, DCS PLC basics, analog signal troubleshooting, process instrumentation, automation engineering interview, control systems basics